Has anyone made their own winshield sun screen or side window shades? Looking to make a screen with magnetic connection similar to Magne Shape which is VERY expensive. I'm looking for those that have purchased the solar material, magnets, etc and cut their from their own pattern. How did you hem the cut edge? How did you mount the magnets on the material? Did you use magnets on both sides of the winshield? What strength and material magnets did you use? Do you leave the screen on 24/7, rain or shine? Thanks for your input.